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The GRAVITY young s...
The GRAVITY young stellar object survey: II. First spatially resolved observations of the CO bandhead emission in a high-mass YSO
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- Garatti, A. Caratti o. (author)
- Dublin Institute for Advanced Studies,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),University College Dublin, National University Of Ireland,Instituto Superior Tecnico
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- Fedriani, Rubén, 1991 (author)
- Dublin Institute for Advanced Studies,University College Dublin, National University Of Ireland,Chalmers tekniska högskola,Chalmers University of Technology
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- Garcia-Lopez, R. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Dublin Institute for Advanced Studies,University College Dublin, National University Of Ireland,Observatoire de Paris,Paris Observatory
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- Koutoulaki, M. (author)
- Dublin Institute for Advanced Studies,University College Dublin, National University Of Ireland,European Southern Observatory (ESO)
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- Perraut, K. (author)
- Université Grenoble Alpes,Grenoble Alpes University,Observatoire de Paris,Paris Observatory
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- Linz, H. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Brandner, W. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Garcia, P. J. V. (author)
- Universidade do Porto,University of Porto,Instituto Superior Tecnico,European Southern Observatory Santiago,Observatoire de Paris,Paris Observatory
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- Klarmann, L. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Henning, T. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Labadie, L. (author)
- Universität zu Köln,University of Cologne,Université Grenoble Alpes,Grenoble Alpes University
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- Sanchez-Bermudez, J. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Universidad Nacional Autónoma de México (UNAM),Universidad Nacional Autonoma de Mexico
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- Lazareff, B. (author)
- Université Grenoble Alpes,Grenoble Alpes University
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- van Dishoeck, E. F. (author)
- Universiteit Leiden (UL),Leiden University (UL),Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Caselli, P. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- De Zeeuw, P. T. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Universiteit Leiden (UL),Leiden University (UL),Observatoire de Paris,Paris Observatory
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- Bik, Adrianus (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Stockholm University
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- Benisty, M. (author)
- European Southern Observatory Santiago,Université Grenoble Alpes,Grenoble Alpes University
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- Dougados, C. (author)
- Université Grenoble Alpes,Grenoble Alpes University
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- Ray, Tom (author)
- Dublin Institute for Advanced Studies
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- Amorim, A. (author)
- Instituto Superior Tecnico,Universität zu Köln,University of Cologne
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- Berger, J. P. (author)
- Université Grenoble Alpes,Grenoble Alpes University
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- Clénet, Y. (author)
- Observatoire de Paris,Paris Observatory
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- Coudé Du Foresto, V. (author)
- Observatoire de Paris,Paris Observatory
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- Duvert, G. (author)
- Université Grenoble Alpes,Grenoble Alpes University
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- Eckart, A. (author)
- Universität zu Köln,University of Cologne
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- Eisenhauer, F. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Gao, F. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Gendron, E. (author)
- Observatoire de Paris,Paris Observatory
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- Genzel, R. (author)
- University of California,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Gillessen, S. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Gordo, P. (author)
- Instituto Superior Tecnico
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- Jocou, L. (author)
- Université Grenoble Alpes,Grenoble Alpes University
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- Horrobin, M. (author)
- Universität zu Köln,University of Cologne
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- Kervella, P. (author)
- Observatoire de Paris,Paris Observatory
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- Lacour, S. (author)
- Observatoire de Paris,Paris Observatory
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- Le Bouquin, J. B. (author)
- Université Grenoble Alpes,Grenoble Alpes University
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- Léna, P. (author)
- Observatoire de Paris,Paris Observatory
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- Grellmann, R. (author)
- Universität zu Köln,University of Cologne
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- Ott, T. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Paumard, T. (author)
- Observatoire de Paris,Paris Observatory
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- Perrin, G. (author)
- Observatoire de Paris,Paris Observatory
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- Rousset, G. (author)
- Observatoire de Paris,Paris Observatory
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- Scheithauer, S. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Shangguan, J. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Stadler, J. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Straub, O. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Straubmeier, C. (author)
- Universität zu Köln,University of Cologne
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- Sturm, E. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Thi, W. F. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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- Vincent, F. H. (author)
- Observatoire de Paris,Paris Observatory
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- Widmann, F. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG)
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Dublin Institute for Advanced Studies Max Planck Gesellschaft zur Förderung der Wissenschaften eV. (MPG) (creator_code:org_t)
- 2020-03-24
- 2020
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 635
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Abstract
Subject headings
Close
- Context. The inner regions of the discs of high-mass young stellar objects (HMYSOs) are still poorly known due to the small angular scales and the high visual extinction involved. Aims. We deploy near-infrared spectro-interferometry to probe the inner gaseous disc in HMYSOs and investigate the origin and physical characteristics of the CO bandhead emission (2.3-2.4 m). Methods. We present the first GRAVITY/VLTI observations at high spectral (R = 4000) and spatial (mas) resolution of the CO overtone transitions in NGC2024 IRS 2. Results. The continuum emission is resolved in all baselines and is slightly asymmetric, displaying small closure phases (8). Our best ellipsoid model provides a disc inclination of 34 1, a disc major axis position angle (PA) of 166 1, and a disc diameter of 3:99 0:09 mas (or 1.69 0.04 au, at a distance of 423 pc). The small closure phase signals in the continuum are modelled with a skewed rim, originating from a pure inclination effect. For the first time, our observations spatially and spectrally resolve the first four CO bandheads. Changes in visibility, as well as differential and closure phases across the bandheads are detected. Both the size and geometry of the CO-emitting region are determined by fitting a bidimensional Gaussian to the continuum-compensated CO bandhead visibilities. The CO-emitting region has a diameter of 2.740:08 0:07 mas (1.16 0.03 au), and is located in the inner gaseous disc, well within the dusty rim, with inclination and PA matching the dusty disc geometry, which indicates that both dusty and gaseous discs are coplanar. Physical and dynamical gas conditions are inferred by modelling the CO spectrum. Finally, we derive a direct measurement of the stellar mass of M 14:7 M by combining our interferometric and spectral modelling results.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
Keyword
- Techniques: spectroscopic
- Methods: observational
- Infrared: stars
- Techniques: interferometric
- Stars: massive
- Stars: formation
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Garatti, A. Cara ...
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Fedriani, Rubén, ...
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Garcia-Lopez, R.
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Koutoulaki, M.
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Perraut, K.
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Linz, H.
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show more...
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Brandner, W.
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Garcia, P. J. V.
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Klarmann, L.
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Henning, T.
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Labadie, L.
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Sanchez-Bermudez ...
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Lazareff, B.
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van Dishoeck, E. ...
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Caselli, P.
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De Zeeuw, P. T.
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Bik, Adrianus
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Benisty, M.
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Dougados, C.
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Ray, Tom
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Amorim, A.
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Berger, J. P.
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Clénet, Y.
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Coudé Du Foresto ...
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Duvert, G.
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Eckart, A.
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Eisenhauer, F.
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Gao, F.
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Gendron, E.
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Genzel, R.
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Gillessen, S.
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Gordo, P.
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Jocou, L.
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Horrobin, M.
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Kervella, P.
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Lacour, S.
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Le Bouquin, J. B ...
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Léna, P.
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Grellmann, R.
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Ott, T.
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Paumard, T.
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Perrin, G.
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Rousset, G.
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Scheithauer, S.
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Shangguan, J.
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Stadler, J.
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Straub, O.
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Straubmeier, C.
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Sturm, E.
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Thi, W. F.
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Vincent, F. H.
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Widmann, F.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Meteorology and ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
- Articles in the publication
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Astronomy and As ...
- By the university
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Chalmers University of Technology
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Stockholm University